package com.itheima.reggie.service.impl;

import cn.hutool.core.util.IdUtil;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.itheima.reggie.common.ResultInfo;
import com.itheima.reggie.domain.Category;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.Date;
import java.util.List;

@Service
@Transactional
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;
    //查询所有
    @Override
    public List<Category> findAll() {
        return categoryMapper.findAll();
    }

    //保存
    @Override
    public void save(Category category) {
        //设置时间和操作人
//        category.setCreateTime(new Date());
//        category.setCreateUser(1L);
//        category.setUpdateTime(new Date());
//        category.setUpdateUser(1L);
        //设置主键
        category.setId(IdUtil.getSnowflake(1,1).nextId());
        //调用mapper保存
        categoryMapper.save(category);
    }

    //修改
    @Override
    public void update(Category category) {
        //更新修改人和时间
//        category.setUpdateTime(new Date());
//        category.setUpdateUser(1L);
        //调用mapper修改
        categoryMapper.update(category);
    }

    @Override
    public ResultInfo delete(Long id) {
        //查询分类菜品数量,有则返回错误
        Integer num1 = categoryMapper.countDishByCategoryId(id);
        if (num1 > 0){
            return ResultInfo.error("当前分类下有菜品,不能删除");
        }
        //查询分类套餐数量,有则返回错误
        Integer num2 = categoryMapper.countSetmealByCategoryId(id);
        if (num2 > 0){
            return ResultInfo.error("当前分类下有套餐,不能删除");
        }
        //根据id删除分类
        categoryMapper.delete(id);
        return ResultInfo.success(null);
    }

    //根据type查询分类
    @Override
    public List<Category> findByType(Integer type) {
        LambdaQueryWrapper<Category> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(Category::getType,type);
        return categoryMapper.selectList(wrapper);
    }
}
